Details

Autor(en) / Beteiligte

• Arul, P.
• John, S. Abraham

Titel

Size controlled synthesis of Ni-MOF using polyvinylpyrrolidone: New electrode material for the trace level determination of nitrobenzene

Ist Teil von

• Journal of electroanalytical chemistry (Lausanne, Switzerland), 2018-11, Vol.829, p.168-176

Ort / Verlag

Amsterdam: Elsevier B.V

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• This article reports the synthesis of nickel organic framework capped with polyvinylpyrrolidone (Ni-MOF-PVP) and their modification on glassy carbon (GC) electrode for highly sensitive and selective determination of nitrobenzene (NB) by voltammetry. The Ni-MOF-PVP was synthesized by simple in-situ solvothermal method. The transmission electron microscopy (TEM) images show that the as prepared Ni-MOF was spherical in shape with an average particle size of 322 nm. The particle size was decreased from 322 to 80 nm after the addition of 600 mg PVP to Ni-MOF. Then, the synthesized Ni-MOF-PVP was fabricated on GC electrode by drop casting. It shows two pairs of redox waves at 0.24 and 0.48 V, corresponding to NiII/NiIII and NiIII MOF−1/NiIII MOF−2 in acetate buffer solution at pH 4. Further, the Ni-MOF-PVP modified electrode was used for the selective and sensitive determination of NB. It shows a sharp reduction peak for NB with 70 mV less positive potential and 2-fold higher reduction current when compared to bare GC electrode. The amperometric current response of NB increases while increasing its concentration from 0.2 μM to 1 mM with a correlation coefficient of 0.9924 and the limit of detection (LOD) was found to be 97 nM (S/N = 3). Finally, the practical application of the Ni-MOF-PVP modified electrode was demonstrated by determining NB in tap and lake water samples and these results were validated with gas chromatography–mass spectrometry (GC–MS) method. This paper describes the synthesis ofNi-MOF-PVP and its modification on glassy carbon electrode for the trace level determination of nitrobenzene. [Display omitted] •Synthesis of Ni-MOF-PVP and their modification on GC electrode were described.•The particle size of Ni-MOF was decreased from 322 to 80 nm in the presence of 600 mg PVP.•Sensitive and stable determination of NB was achieved using the modified electrode.•Practical application was demonstrated by determining NB in tap and lake water samples.